Head Install - P0300 Misfire Error
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From: Little Rhody
Head Install - P0300 Misfire Error Just finished installing a set of Dart 205's. Car has a VHP cam which is 216/224 .551/.551 115LSA which is not too radical but is a little lumpy on idle. Had no codes prior to the heads, but now it is throwing the P0300 and when I look at which cylinder, it is all of them not limited to just one. I can't detect a misfire and the car absolutely runs fantastic from cold start to running hard. I have not yet had it tuned from the head installation, is this a normal thing to have happen?
I got the same code with my heads/cam install.
Check plugs/wire just to be sure, but most likely, the cam is confusing the computer into thinking it has a misfire.
I changed the misfire parameters at idle and no more code.
If you have a misfire in higher rpm ranges, that would be a different story.
Basicaly, blame the cam, tune it out.
Check plugs/wire just to be sure, but most likely, the cam is confusing the computer into thinking it has a misfire.
I changed the misfire parameters at idle and no more code.
If you have a misfire in higher rpm ranges, that would be a different story.
Basicaly, blame the cam, tune it out.
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Joined: Aug 2005
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From: Sunny London, UK
I agree, its the cam.
You can set the code to not report same as you do for changing maf codes to no mil or whatever. Or better than that there are a whole lot of misfire tables that you can adjust to "tune" it out.
Take a look in your tuning software. Low rpm and maybe idle misfire tables.
In efi the tables are C5601 to C5627 loads to play with there.
You can set the code to not report same as you do for changing maf codes to no mil or whatever. Or better than that there are a whole lot of misfire tables that you can adjust to "tune" it out.
Take a look in your tuning software. Low rpm and maybe idle misfire tables.
In efi the tables are C5601 to C5627 loads to play with there.
